42450281 has 4 divisors (see below), whose sum is σ = 42467712. Its totient is φ = 42432852.

The previous prime is 42450271. The next prime is 42450301. The reversal of 42450281 is 18205424.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42450281 - 2²² = 38255977 is a prime.

It is a super-2 number, since 2×42450281² = 3604052713957922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42450281.

It is not an unprimeable number, because it can be changed into a prime (42450271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4325 + ... + 10178.

It is an arithmetic number, because the mean of its divisors is an integer number (10616928).

Almost surely, 2^42450281 is an apocalyptic number.

It is an amenable number.

42450281 is a deficient number, since it is larger than the sum of its proper divisors (17431).

42450281 is a wasteful number, since it uses less digits than its factorization.

42450281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17430.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 42450281 is about 6515.3880160739. The cubic root of 42450281 is about 348.8404647919.

It can be divided in two parts, 424 and 50281, that added together give a palindrome (50705).

The spelling of 42450281 in words is "forty-two million, four hundred fifty thousand, two hundred eighty-one".